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Discussion Starter · #1 ·
Aerated the yard today and about 45 minutes to an hour into cutting grass while pulling aerator the engine overheated and died, let it sit for a few minutes and got it back to garage. tried to start it after an hour 15 minutes later and it wont start, turns over but thats it. I took plug out and turned it over to see if spark, no spark, tried a new plug at .035 gap and no spark. I put an amp meter on coil, turned ignition on and I got no reading at coil, new coil 2 years ago with condeser and points. battery showing 11 amps. Whats next the solenoid, or the regulator?? or could it be the points gap no good?? any help greatly appreciated.
 

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What do you mean you put an amp meter on the coil and the battery showing 11 amps?
If the battery can turn the engine over there is enough to power the coil.
You have power at the coil with the ignition switch on?
If you do you can check the resistance on the primary (+ to - post) and secondary (high tension leads) windings. That will tell you if it is good
 

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The solenoid can not cause a no spark situation.Try a new spark plug and see if that makes a difference.
Also,just because the coil is only 2 years old does not mean that it can't be the problem.
Have you got another coil you can try ?





Maynard :canada:
 

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When you said "amps" and "ammeter" I am assuming you meant volts and voltmeter. Check voltage to (batt) terminal on ign. switch. Should be battery voltage on that terminal. Good bet that there is because it runs the starter. Turn switch to "ignition"position there should battery voltage on the "ign" terminal. If there is, the switch is good. If there's not the ignition switch is bad. Check for battery voltage on + side of coil. If it's not there, carefully check wire from ign. to coil. While doing these voltage checks, clamp the (-) lead of the meter to the (-) terminal of the battery. This ensures a good ground and frees up a hand.
 

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It would help from this point to know the model and serial # and if it's been repowered and with what, to be able to help from this point. There are a few different ignition systems on these things. Troubleshooting can be quite different for each. Could be something as simple a a bad condensor or a chaffed wire. Could be as bad as an Onan part that's made of Unobtainium :lol:
 

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Discussion Starter · #10 ·
Re: Engine oveheated - no spark from plug now Kohler 321 14h

Gentleman - thanks for the help - I did use a volt meter dont know why I called it amp meter??? Billygoat I followed your direction and I do have 11.89 volts at the coil when the ignition is in the on position. I also placed + side of volt meter in the plug wire end and got same reading, so plug wire looks ok. So that should mean that the ignition switch is good.. correct?? I did use new plugs, still no spark... I did not take point cover off yet I will try to do that tomorrow. What should I try next?? Condensor or points??
 

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This is the same engine you had te problem with pump or carb right?

Based on your other post and description of what youre engine was doing I'd do what 99FLHR is saying and swap out that coil. When they're going bad they will be fine when cool/cold and then start to short out internally when hot.
 
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